(svn r23471) -Codechange: move the error related code out of misc_gui.cpp into error_gui.cpp

7 files changed, 296 insertions, 260 deletions

diff --git a/projects/openttd_vs100.vcxproj b/projects/openttd_vs100.vcxproj
index 85ea55ac6..940b809c8 100644
--- a/projects/openttd_vs100.vcxproj
+++ b/projects/openttd_vs100.vcxproj
@@ -646,6 +646,7 @@
     <ClCompile Include="..\src\depot_gui.cpp" />
     <ClCompile Include="..\src\dock_gui.cpp" />
     <ClCompile Include="..\src\engine_gui.cpp" />
+    <ClCompile Include="..\src\error_gui.cpp" />
     <ClCompile Include="..\src\fios_gui.cpp" />
     <ClCompile Include="..\src\genworld_gui.cpp" />
     <ClCompile Include="..\src\graph_gui.cpp" />
diff --git a/projects/openttd_vs100.vcxproj.filters b/projects/openttd_vs100.vcxproj.filters
index 43bb5b6ef..9c5ebfcf2 100644
--- a/projects/openttd_vs100.vcxproj.filters
+++ b/projects/openttd_vs100.vcxproj.filters
@@ -1161,6 +1161,9 @@
     <ClCompile Include="..\src\engine_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\error_gui.cpp">
+      <Filter>GUI Source Code</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\fios_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index 896e14b04..e117f901c 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -1867,6 +1867,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\error_gui.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\fios_gui.cpp"
 				>
 			</File>
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index d17c07663..2898eb756 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -1864,6 +1864,10 @@
 				>
 			</File>
 			<File
+				RelativePath=".\..\src\error_gui.cpp"
+				>
+			</File>
+			<File
 				RelativePath=".\..\src\fios_gui.cpp"
 				>
 			</File>
diff --git a/source.list b/source.list
index 4a395c4e8..185859af8 100644
--- a/source.list
+++ b/source.list
@@ -398,6 +398,7 @@ date_gui.cpp
 depot_gui.cpp
 dock_gui.cpp
 engine_gui.cpp
+error_gui.cpp
 fios_gui.cpp
 genworld_gui.cpp
 graph_gui.cpp
diff --git a/src/error_gui.cpp b/src/error_gui.cpp
new file mode 100644
index 000000000..3626f8968
--- /dev/null
+++ b/src/error_gui.cpp
@@ -0,0 +1,283 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file error_gui.cpp GUI related to errors. */
+
+#include "stdafx.h"
+#include "landscape.h"
+#include "newgrf_text.h"
+#include "gui.h"
+#include "viewport_func.h"
+#include "gfx_func.h"
+#include "string_func.h"
+#include "company_base.h"
+#include "company_manager_face.h"
+#include "strings_func.h"
+#include "zoom_func.h"
+#include "window_func.h"
+#include "console_func.h"
+#include "window_gui.h"
+
+#include "table/strings.h"
+
+/** Widgets of the error message windows */
+enum ErrorMessageWidgets {
+	EMW_CAPTION,
+	EMW_FACE,
+	EMW_MESSAGE,
+};
+
+static const NWidgetPart _nested_errmsg_widgets[] = {
+	NWidget(NWID_HORIZONTAL),
+		NWidget(WWT_CLOSEBOX, COLOUR_RED),
+		NWidget(WWT_CAPTION, COLOUR_RED, EMW_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION, STR_NULL),
+	EndContainer(),
+	NWidget(WWT_PANEL, COLOUR_RED),
+		NWidget(WWT_EMPTY, COLOUR_RED, EMW_MESSAGE), SetPadding(0, 2, 0, 2), SetMinimalSize(236, 32),
+	EndContainer(),
+};
+
+static const WindowDesc _errmsg_desc(
+	WDP_MANUAL, 0, 0,
+	WC_ERRMSG, WC_NONE,
+	0,
+	_nested_errmsg_widgets, lengthof(_nested_errmsg_widgets)
+);
+
+static const NWidgetPart _nested_errmsg_face_widgets[] = {
+	NWidget(NWID_HORIZONTAL),
+		NWidget(WWT_CLOSEBOX, COLOUR_RED),
+		NWidget(WWT_CAPTION, COLOUR_RED, EMW_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION_OTHER_COMPANY, STR_NULL),
+	EndContainer(),
+	NWidget(WWT_PANEL, COLOUR_RED),
+		NWidget(NWID_HORIZONTAL), SetPIP(2, 1, 2),
+			NWidget(WWT_EMPTY, COLOUR_RED, EMW_FACE), SetMinimalSize(92, 119), SetFill(0, 1), SetPadding(2, 0, 1, 0),
+			NWidget(WWT_EMPTY, COLOUR_RED, EMW_MESSAGE), SetFill(0, 1), SetMinimalSize(238, 123),
+		EndContainer(),
+	EndContainer(),
+};
+
+static const WindowDesc _errmsg_face_desc(
+	WDP_MANUAL, 0, 0,
+	WC_ERRMSG, WC_NONE,
+	0,
+	_nested_errmsg_face_widgets, lengthof(_nested_errmsg_face_widgets)
+);
+
+/** Window class for displaying an error message window. */
+struct ErrmsgWindow : public Window {
+private:
+	uint duration;                  ///< Length of display of the message. 0 means forever,
+	uint64 decode_params[20];       ///< Parameters of the message strings.
+	uint textref_stack_size;        ///< Number of uint32 values to put on the #TextRefStack for the error message.
+	uint32 textref_stack[16];       ///< Values to put on the #TextRefStack for the error message.
+	StringID summary_msg;           ///< General error message showed in first line. Must be valid.
+	StringID detailed_msg;          ///< Detailed error message showed in second line. Can be #INVALID_STRING_ID.
+	uint height_summary;            ///< Height of the #summary_msg string in pixels in the #EMW_MESSAGE widget.
+	uint height_detailed;           ///< Height of the #detailed_msg string in pixels in the #EMW_MESSAGE widget.
+	Point position;                 ///< Position of the error message window.
+	CompanyID face;                 ///< Company belonging to the face being shown. #INVALID_COMPANY if no face present.
+
+public:
+	ErrmsgWindow(Point pt, StringID summary_msg, StringID detailed_msg, bool no_timeout, uint textref_stack_size, const uint32 *textref_stack) : Window()
+	{
+		this->position = pt;
+		this->duration = no_timeout ? 0 : _settings_client.gui.errmsg_duration;
+		CopyOutDParam(this->decode_params, 0, lengthof(this->decode_params));
+		this->summary_msg  = summary_msg;
+		this->detailed_msg = detailed_msg;
+		this->textref_stack_size = textref_stack_size;
+		if (textref_stack_size > 0) {
+			MemCpyT(this->textref_stack, textref_stack, textref_stack_size);
+		}
+
+		CompanyID company = (CompanyID)GetDParamX(this->decode_params, 2);
+		this->face = (this->detailed_msg == STR_ERROR_OWNED_BY && company < MAX_COMPANIES) ? company : INVALID_COMPANY;
+		const WindowDesc *desc = (face == INVALID_COMPANY) ? &_errmsg_desc : &_errmsg_face_desc;
+
+		assert(summary_msg != INVALID_STRING_ID);
+
+		this->InitNested(desc);
+	}
+
+	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
+	{
+		if (widget != EMW_MESSAGE) return;
+
+		CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
+		if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_size, this->textref_stack);
+
+		int text_width = max(0, (int)size->width - WD_FRAMETEXT_LEFT - WD_FRAMETEXT_RIGHT);
+		this->height_summary  = GetStringHeight(this->summary_msg, text_width);
+		this->height_detailed = (this->detailed_msg == INVALID_STRING_ID) ? 0 : GetStringHeight(this->detailed_msg, text_width);
+
+		if (this->textref_stack_size > 0) StopTextRefStackUsage();
+
+		uint panel_height = WD_FRAMERECT_TOP + this->height_summary + WD_FRAMERECT_BOTTOM;
+		if (this->detailed_msg != INVALID_STRING_ID) panel_height += this->height_detailed + WD_PAR_VSEP_WIDE;
+
+		size->height = max(size->height, panel_height);
+	}
+
+	virtual Point OnInitialPosition(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
+	{
+		/* Position (0, 0) given, center the window. */
+		if (this->position.x == 0 && this->position.y == 0) {
+			Point pt = {(_screen.width - sm_width) >> 1, (_screen.height - sm_height) >> 1};
+			return pt;
+		}
+
+		/* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
+		 * Add a fixed distance 20 to make it less cluttered.
+		 */
+		int scr_top = GetMainViewTop() + 20;
+		int scr_bot = GetMainViewBottom() - 20;
+
+		Point pt = RemapCoords2(this->position.x, this->position.y);
+		const ViewPort *vp = FindWindowById(WC_MAIN_WINDOW, 0)->viewport;
+		if (this->face == INVALID_COMPANY) {
+			/* move x pos to opposite corner */
+			pt.x = UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left;
+			pt.x = (pt.x < (_screen.width >> 1)) ? _screen.width - sm_width - 20 : 20; // Stay 20 pixels away from the edge of the screen.
+
+			/* move y pos to opposite corner */
+			pt.y = UnScaleByZoom(pt.y - vp->virtual_top, vp->zoom) + vp->top;
+			pt.y = (pt.y < (_screen.height >> 1)) ? scr_bot - sm_height : scr_top;
+		} else {
+			pt.x = Clamp(UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left - (sm_width / 2),  0, _screen.width  - sm_width);
+			pt.y = Clamp(UnScaleByZoom(pt.y - vp->virtual_top,  vp->zoom) + vp->top  - (sm_height / 2), scr_top, scr_bot - sm_height);
+		}
+		return pt;
+	}
+
+	/**
+	 * Some data on this window has become invalid.
+	 * @param data Information about the changed data.
+	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
+	 */
+	virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
+	{
+		/* If company gets shut down, while displaying an error about it, remove the error message. */
+		if (this->face != INVALID_COMPANY && !Company::IsValidID(this->face)) delete this;
+	}
+
+	virtual void SetStringParameters(int widget) const
+	{
+		if (widget == EMW_CAPTION) CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
+	}
+
+	virtual void DrawWidget(const Rect &r, int widget) const
+	{
+		switch (widget) {
+			case EMW_FACE: {
+				const Company *c = Company::Get(this->face);
+				DrawCompanyManagerFace(c->face, c->colour, r.left, r.top);
+				break;
+			}
+
+			case EMW_MESSAGE:
+				CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
+				if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_size, this->textref_stack);
+
+				if (this->detailed_msg == INVALID_STRING_ID) {
+					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
+							this->summary_msg, TC_FROMSTRING, SA_CENTER);
+				} else {
+					int extra = (r.bottom - r.top + 1 - this->height_summary - this->height_detailed - WD_PAR_VSEP_WIDE) / 2;
+
+					/* Note: NewGRF supplied error message often do not start with a colour code, so default to white. */
+					int top = r.top + WD_FRAMERECT_TOP;
+					int bottom = top + this->height_summary + extra;
+					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->summary_msg, TC_WHITE, SA_CENTER);
+
+					bottom = r.bottom - WD_FRAMERECT_BOTTOM;
+					top = bottom - this->height_detailed - extra;
+					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->detailed_msg, TC_WHITE, SA_CENTER);
+				}
+
+				if (this->textref_stack_size > 0) StopTextRefStackUsage();
+				break;
+
+			default:
+				break;
+		}
+	}
+
+	virtual void OnMouseLoop()
+	{
+		/* Disallow closing the window too easily, if timeout is disabled */
+		if (_right_button_down && this->duration != 0) delete this;
+	}
+
+	virtual void OnHundredthTick()
+	{
+		/* Timeout enabled? */
+		if (this->duration != 0) {
+			this->duration--;
+			if (this->duration == 0) delete this;
+		}
+	}
+
+	~ErrmsgWindow()
+	{
+		SetRedErrorSquare(INVALID_TILE);
+	}
+
+	virtual EventState OnKeyPress(uint16 key, uint16 keycode)
+	{
+		if (keycode != WKC_SPACE) return ES_NOT_HANDLED;
+		delete this;
+		return ES_HANDLED;
+	}
+};
+
+/**
+ * Display an error message in a window.
+ * @param summary_msg  General error message showed in first line. Must be valid.
+ * @param detailed_msg Detailed error message showed in second line. Can be INVALID_STRING_ID.
+ * @param wl           Message severity.
+ * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
+ * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
+ * @param textref_stack_size Number of uint32 values to put on the #TextRefStack for the error message; 0 if the #TextRefStack shall not be used.
+ * @param textref_stack Values to put on the #TextRefStack.
+ */
+void ShowErrorMessage(StringID summary_msg, StringID detailed_msg, WarningLevel wl, int x, int y, uint textref_stack_size, const uint32 *textref_stack)
+{
+	assert(textref_stack_size == 0 || textref_stack != NULL);
+	if (summary_msg == STR_NULL) summary_msg = STR_EMPTY;
+
+	if (wl != WL_INFO) {
+		/* Print message to console */
+		char buf[DRAW_STRING_BUFFER];
+
+		if (textref_stack_size > 0) StartTextRefStackUsage(textref_stack_size, textref_stack);
+
+		char *b = GetString(buf, summary_msg, lastof(buf));
+		if (detailed_msg != INVALID_STRING_ID) {
+			b += seprintf(b, lastof(buf), " ");
+			GetString(b, detailed_msg, lastof(buf));
+		}
+
+		if (textref_stack_size > 0) StopTextRefStackUsage();
+
+		switch (wl) {
+			case WL_WARNING: IConsolePrint(CC_WARNING, buf); break;
+			default:         IConsoleError(buf); break;
+		}
+	}
+
+	bool no_timeout = wl == WL_CRITICAL;
+
+	if (_settings_client.gui.errmsg_duration == 0 && !no_timeout) return;
+
+	DeleteWindowById(WC_ERRMSG, 0);
+
+	Point pt = {x, y};
+	new ErrmsgWindow(pt, summary_msg, detailed_msg, no_timeout, textref_stack_size, textref_stack);
+}
diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index ed1933948..5e16f1185 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -12,7 +12,6 @@
 #include "stdafx.h"
 #include "debug.h"
 #include "landscape.h"
-#include "newgrf_text.h"
 #include "gui.h"
 #include "viewport_func.h"
 #include "gfx_func.h"
@@ -22,12 +21,9 @@
 #include "string_func.h"
 #include "company_base.h"
 #include "texteff.hpp"
-#include "company_manager_face.h"
 #include "strings_func.h"
-#include "zoom_func.h"
 #include "window_func.h"
 #include "querystring_gui.h"
-#include "console_func.h"
 #include "core/geometry_func.hpp"
 #include "newgrf_debug.h"
 
@@ -518,262 +514,6 @@ void ShowAboutWindow()
 	new AboutWindow();
 }
 
-/** Widgets of the error message windows */
-enum ErrorMessageWidgets {
-	EMW_CAPTION,
-	EMW_FACE,
-	EMW_MESSAGE,
-};
-
-static const NWidgetPart _nested_errmsg_widgets[] = {
-	NWidget(NWID_HORIZONTAL),
-		NWidget(WWT_CLOSEBOX, COLOUR_RED),
-		NWidget(WWT_CAPTION, COLOUR_RED, EMW_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION, STR_NULL),
-	EndContainer(),
-	NWidget(WWT_PANEL, COLOUR_RED),
-		NWidget(WWT_EMPTY, COLOUR_RED, EMW_MESSAGE), SetPadding(0, 2, 0, 2), SetMinimalSize(236, 32),
-	EndContainer(),
-};
-
-static const WindowDesc _errmsg_desc(
-	WDP_MANUAL, 0, 0,
-	WC_ERRMSG, WC_NONE,
-	0,
-	_nested_errmsg_widgets, lengthof(_nested_errmsg_widgets)
-);
-
-static const NWidgetPart _nested_errmsg_face_widgets[] = {
-	NWidget(NWID_HORIZONTAL),
-		NWidget(WWT_CLOSEBOX, COLOUR_RED),
-		NWidget(WWT_CAPTION, COLOUR_RED, EMW_CAPTION), SetDataTip(STR_ERROR_MESSAGE_CAPTION_OTHER_COMPANY, STR_NULL),
-	EndContainer(),
-	NWidget(WWT_PANEL, COLOUR_RED),
-		NWidget(NWID_HORIZONTAL), SetPIP(2, 1, 2),
-			NWidget(WWT_EMPTY, COLOUR_RED, EMW_FACE), SetMinimalSize(92, 119), SetFill(0, 1), SetPadding(2, 0, 1, 0),
-			NWidget(WWT_EMPTY, COLOUR_RED, EMW_MESSAGE), SetFill(0, 1), SetMinimalSize(238, 123),
-		EndContainer(),
-	EndContainer(),
-};
-
-static const WindowDesc _errmsg_face_desc(
-	WDP_MANUAL, 0, 0,
-	WC_ERRMSG, WC_NONE,
-	0,
-	_nested_errmsg_face_widgets, lengthof(_nested_errmsg_face_widgets)
-);
-
-/** Window class for displaying an error message window. */
-struct ErrmsgWindow : public Window {
-private:
-	uint duration;                  ///< Length of display of the message. 0 means forever,
-	uint64 decode_params[20];       ///< Parameters of the message strings.
-	uint textref_stack_size;        ///< Number of uint32 values to put on the #TextRefStack for the error message.
-	uint32 textref_stack[16];       ///< Values to put on the #TextRefStack for the error message.
-	StringID summary_msg;           ///< General error message showed in first line. Must be valid.
-	StringID detailed_msg;          ///< Detailed error message showed in second line. Can be #INVALID_STRING_ID.
-	uint height_summary;            ///< Height of the #summary_msg string in pixels in the #EMW_MESSAGE widget.
-	uint height_detailed;           ///< Height of the #detailed_msg string in pixels in the #EMW_MESSAGE widget.
-	Point position;                 ///< Position of the error message window.
-	CompanyID face;                 ///< Company belonging to the face being shown. #INVALID_COMPANY if no face present.
-
-public:
-	ErrmsgWindow(Point pt, StringID summary_msg, StringID detailed_msg, bool no_timeout, uint textref_stack_size, const uint32 *textref_stack) : Window()
-	{
-		this->position = pt;
-		this->duration = no_timeout ? 0 : _settings_client.gui.errmsg_duration;
-		CopyOutDParam(this->decode_params, 0, lengthof(this->decode_params));
-		this->summary_msg  = summary_msg;
-		this->detailed_msg = detailed_msg;
-		this->textref_stack_size = textref_stack_size;
-		if (textref_stack_size > 0) {
-			MemCpyT(this->textref_stack, textref_stack, textref_stack_size);
-		}
-
-		CompanyID company = (CompanyID)GetDParamX(this->decode_params, 2);
-		this->face = (this->detailed_msg == STR_ERROR_OWNED_BY && company < MAX_COMPANIES) ? company : INVALID_COMPANY;
-		const WindowDesc *desc = (face == INVALID_COMPANY) ? &_errmsg_desc : &_errmsg_face_desc;
-
-		assert(summary_msg != INVALID_STRING_ID);
-
-		this->InitNested(desc);
-	}
-
-	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
-	{
-		if (widget != EMW_MESSAGE) return;
-
-		CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
-		if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_size, this->textref_stack);
-
-		int text_width = max(0, (int)size->width - WD_FRAMETEXT_LEFT - WD_FRAMETEXT_RIGHT);
-		this->height_summary  = GetStringHeight(this->summary_msg, text_width);
-		this->height_detailed = (this->detailed_msg == INVALID_STRING_ID) ? 0 : GetStringHeight(this->detailed_msg, text_width);
-
-		if (this->textref_stack_size > 0) StopTextRefStackUsage();
-
-		uint panel_height = WD_FRAMERECT_TOP + this->height_summary + WD_FRAMERECT_BOTTOM;
-		if (this->detailed_msg != INVALID_STRING_ID) panel_height += this->height_detailed + WD_PAR_VSEP_WIDE;
-
-		size->height = max(size->height, panel_height);
-	}
-
-	virtual Point OnInitialPosition(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
-	{
-		/* Position (0, 0) given, center the window. */
-		if (this->position.x == 0 && this->position.y == 0) {
-			Point pt = {(_screen.width - sm_width) >> 1, (_screen.height - sm_height) >> 1};
-			return pt;
-		}
-
-		/* Find the free screen space between the main toolbar at the top, and the statusbar at the bottom.
-		 * Add a fixed distance 20 to make it less cluttered.
-		 */
-		int scr_top = GetMainViewTop() + 20;
-		int scr_bot = GetMainViewBottom() - 20;
-
-		Point pt = RemapCoords2(this->position.x, this->position.y);
-		const ViewPort *vp = FindWindowById(WC_MAIN_WINDOW, 0)->viewport;
-		if (this->face == INVALID_COMPANY) {
-			/* move x pos to opposite corner */
-			pt.x = UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left;
-			pt.x = (pt.x < (_screen.width >> 1)) ? _screen.width - sm_width - 20 : 20; // Stay 20 pixels away from the edge of the screen.
-
-			/* move y pos to opposite corner */
-			pt.y = UnScaleByZoom(pt.y - vp->virtual_top, vp->zoom) + vp->top;
-			pt.y = (pt.y < (_screen.height >> 1)) ? scr_bot - sm_height : scr_top;
-		} else {
-			pt.x = Clamp(UnScaleByZoom(pt.x - vp->virtual_left, vp->zoom) + vp->left - (sm_width / 2),  0, _screen.width  - sm_width);
-			pt.y = Clamp(UnScaleByZoom(pt.y - vp->virtual_top,  vp->zoom) + vp->top  - (sm_height / 2), scr_top, scr_bot - sm_height);
-		}
-		return pt;
-	}
-
-	/**
-	 * Some data on this window has become invalid.
-	 * @param data Information about the changed data.
-	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
-	 */
-	virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
-	{
-		/* If company gets shut down, while displaying an error about it, remove the error message. */
-		if (this->face != INVALID_COMPANY && !Company::IsValidID(this->face)) delete this;
-	}
-
-	virtual void SetStringParameters(int widget) const
-	{
-		if (widget == EMW_CAPTION) CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
-	}
-
-	virtual void DrawWidget(const Rect &r, int widget) const
-	{
-		switch (widget) {
-			case EMW_FACE: {
-				const Company *c = Company::Get(this->face);
-				DrawCompanyManagerFace(c->face, c->colour, r.left, r.top);
-				break;
-			}
-
-			case EMW_MESSAGE:
-				CopyInDParam(0, this->decode_params, lengthof(this->decode_params));
-				if (this->textref_stack_size > 0) StartTextRefStackUsage(this->textref_stack_size, this->textref_stack);
-
-				if (this->detailed_msg == INVALID_STRING_ID) {
-					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top + WD_FRAMERECT_TOP, r.bottom - WD_FRAMERECT_BOTTOM,
-							this->summary_msg, TC_FROMSTRING, SA_CENTER);
-				} else {
-					int extra = (r.bottom - r.top + 1 - this->height_summary - this->height_detailed - WD_PAR_VSEP_WIDE) / 2;
-
-					/* Note: NewGRF supplied error message often do not start with a colour code, so default to white. */
-					int top = r.top + WD_FRAMERECT_TOP;
-					int bottom = top + this->height_summary + extra;
-					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->summary_msg, TC_WHITE, SA_CENTER);
-
-					bottom = r.bottom - WD_FRAMERECT_BOTTOM;
-					top = bottom - this->height_detailed - extra;
-					DrawStringMultiLine(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, top, bottom, this->detailed_msg, TC_WHITE, SA_CENTER);
-				}
-
-				if (this->textref_stack_size > 0) StopTextRefStackUsage();
-				break;
-
-			default:
-				break;
-		}
-	}
-
-	virtual void OnMouseLoop()
-	{
-		/* Disallow closing the window too easily, if timeout is disabled */
-		if (_right_button_down && this->duration != 0) delete this;
-	}
-
-	virtual void OnHundredthTick()
-	{
-		/* Timeout enabled? */
-		if (this->duration != 0) {
-			this->duration--;
-			if (this->duration == 0) delete this;
-		}
-	}
-
-	~ErrmsgWindow()
-	{
-		SetRedErrorSquare(INVALID_TILE);
-	}
-
-	virtual EventState OnKeyPress(uint16 key, uint16 keycode)
-	{
-		if (keycode != WKC_SPACE) return ES_NOT_HANDLED;
-		delete this;
-		return ES_HANDLED;
-	}
-};
-
-/**
- * Display an error message in a window.
- * @param summary_msg  General error message showed in first line. Must be valid.
- * @param detailed_msg Detailed error message showed in second line. Can be INVALID_STRING_ID.
- * @param wl           Message severity.
- * @param x            World X position (TileVirtX) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
- * @param y            World Y position (TileVirtY) of the error location. Set both x and y to 0 to just center the message when there is no related error tile.
- * @param textref_stack_size Number of uint32 values to put on the #TextRefStack for the error message; 0 if the #TextRefStack shall not be used.
- * @param textref_stack Values to put on the #TextRefStack.
- */
-void ShowErrorMessage(StringID summary_msg, StringID detailed_msg, WarningLevel wl, int x, int y, uint textref_stack_size, const uint32 *textref_stack)
-{
-	assert(textref_stack_size == 0 || textref_stack != NULL);
-	if (summary_msg == STR_NULL) summary_msg = STR_EMPTY;
-
-	if (wl != WL_INFO) {
-		/* Print message to console */
-		char buf[DRAW_STRING_BUFFER];
-
-		if (textref_stack_size > 0) StartTextRefStackUsage(textref_stack_size, textref_stack);
-
-		char *b = GetString(buf, summary_msg, lastof(buf));
-		if (detailed_msg != INVALID_STRING_ID) {
-			b += seprintf(b, lastof(buf), " ");
-			GetString(b, detailed_msg, lastof(buf));
-		}
-
-		if (textref_stack_size > 0) StopTextRefStackUsage();
-
-		switch (wl) {
-			case WL_WARNING: IConsolePrint(CC_WARNING, buf); break;
-			default:         IConsoleError(buf); break;
-		}
-	}
-
-	bool no_timeout = wl == WL_CRITICAL;
-
-	if (_settings_client.gui.errmsg_duration == 0 && !no_timeout) return;
-
-	DeleteWindowById(WC_ERRMSG, 0);
-
-	Point pt = {x, y};
-	new ErrmsgWindow(pt, summary_msg, detailed_msg, no_timeout, textref_stack_size, textref_stack);
-}
-
 /**
  * Display estimated costs.
  * @param cost Estimated cost (or income if negative).